Paper feed roller and image forming apparatus with the paper feed roller

A paper feed roller comprising a roller body integrally formed of elastic material in a cylindrical shape in which a plurality of protruding lines are disposed on a peripheral surface at even intervals;

• wherein the roller body is formed so that crest portions and trough portions are continuously provided in a circumferential direction in a cross section orthogonal to an axial direction of the roller body,
• an opening angle between adjacent protruding lines about a central axis of the roller body is equal to or more than 2° and is equal to or less than 8°,
• a radial height of the protruding lines, being a difference between heights of the crest portions and the trough portions, is equal to or more than 0.051 mm and is equal to or less than 0.1 mm, and
• a curvature radius at a shoulder of the crest portions, having a smallest curvature radius of the crest portions, is equal to or more than 0.55 mm.